LET'S DO THE MATH1st day - give students a bag to pick and return to. The bags are unlabelled. Blue wins. How do they keep track of the activity?
2nd day - display what's in the bag. Ask students to identify the bag they used the day before and explain.
Then students are shown the original bags plus two more. Students are asked to choose a bag now, but red wins.
Students must explain reasoning for bag choice.
3 students chose 6R/4B
4 students chose 15B/15R (The students explained that they could have chosen 10B/10R, but they wanted "more" red)
12students chose 12R/8B (They explained that 6/4 there was only a difference of 2 compared with the 12/8 split has a bigger difference i.e. 4)
Emergence - Stephen Johnson http://www.amazon.ca/Emergence-Connected-Brains-Cities-Software-ebook/dp/B008TRUBLY/ref=sr_1_2?s=books&ie=UTF8&qid=1424528623&sr=1-2&keywords=emergence
Students were thinking about additive relationship but not multiplicative or proportional reasoning.
WHY COUNTING MATTERS
In grade six, two students couldn't agree on the answer to 4 x 2 + _ = 18
We need to work on making 10 with students.
Playing games and using visuals to develop and reinforce these ideas is important.
Eyes on Math by Marian Small visuals are available online for free http://www.amazon.ca/Emergence-Connected-Brains-Cities-Software-ebook/dp/B008TRUBLY/ref=sr_1_2?s=books&ie=UTF8&qid=1424528623&sr=1-2&keywords=emergence
Math solutions.com - Marilyn Burns website free resources available (PPT prepared by staff - presentations sectio; check out reasoning for videos of students)
Make counting strings to illustrate counting, making 10, etc. precursor to open number line.
Children naturally decompose numbers when using bead strings and hundred charts which can lead to the thinking needed for on open number line.
What Works for Children with Mathematical Difficulties online PDF http://www.catchup.org/Portals/3/CU%20research/What%20works%20for%20children%20with%20mathematical%20difficulties%202004.pdf
STRATEGIES FOR USING AN EMPTY NUMBER LINE
Www.k-5mathteachingresources.com/empty-number-line.html